2007 Opel Astra vs. 2004 Opel Signum
To start off, 2007 Opel Astra is newer by 3 year(s). Which means there will be less support and parts availability for 2004 Opel Signum. In addition, the cost of maintenance, including insurance, on 2004 Opel Signum would be higher. At 1,910 cc (4 cylinders), 2004 Opel Signum is equipped with a bigger engine. In terms of performance, 2007 Opel Astra (139 HP @ 5600 RPM) has 40 more horse power than 2004 Opel Signum. (99 HP @ 3120 RPM). In normal driving conditions, 2007 Opel Astra should accelerate faster than 2004 Opel Signum. With that said, vehicle weight also plays an important factor in acceleration. 2004 Opel Signum weights approximately 317 kg more than 2007 Opel Astra.
Both vehicles are front wheel drive (FWD). Which offers better traction when its slippery than rear wheel drive vehicles. With that said, do keep in mind that many other factors such as speed and the wear on your tires can also have significant impact on traction and control. Let's talk about torque, 2004 Opel Signum (230 Nm @ 1500 RPM) has 55 more torque (in Nm) than 2007 Opel Astra. (175 Nm @ 3800 RPM). This means 2004 Opel Signum will have an easier job in driving up hills or pulling heavy equipment than 2007 Opel Astra.
Compare all specifications:
| 2007 Opel Astra | 2004 Opel Signum | |
| Make | Opel | Opel |
| Model | Astra | Signum |
| Year Released | 2007 | 2004 |
| Engine Position | Front | Front |
| Engine Size | 1796 cc | 1910 cc |
| Engine Cylinders | 4 cylinders | 4 cylinders |
| Engine Type | in-line | in-line |
| Valves per Cylinder | 4 valves | 4 valves |
| Horse Power | 139 HP | 99 HP |
| Engine RPM | 5600 RPM | 3120 RPM |
| Torque | 175 Nm | 230 Nm |
| Torque RPM | 3800 RPM | 1500 RPM |
| Engine Bore Size | 80.5 mm | 84.1 mm |
| Engine Stroke Size | 88.2 mm | 90 mm |
| Engine Compression Ratio | 10.5:1 | 18.5:1 |
| Fuel Type | Gasoline | Diesel |
| Drive Type | Front | Front |
| Transmission Type | Manual | Manual |
| Number of Seats | 5 seats | 5 seats |
| Number of Doors | 5 doors | 5 doors |
| Vehicle Weight | 1278 kg | 1595 kg |
| Vehicle Length | 4260 mm | 4640 mm |
| Vehicle Width | 1760 mm | 1800 mm |
| Vehicle Height | 1470 mm | 1470 mm |
| Wheelbase Size | 2620 mm | 2620 mm |
| Fuel Consumption Overall | 7.3 L/100km | 5.9 L/100km |
| Fuel Tank Capacity | 52 L | 58 L |
